Gas plate



C. A. KIRKWOOD. 4 GAS PLATE.

APPLICATION FILED APR. 26, 1920- 'l,4=05,521. V Patented ma, 1922;-

- 3 SHEETS-SHEET I.

C. A. KIRKW OOD.

GAS PLATE.

APPLICATION 'HLED APR.26,1920.

3 SHEETS-SHEET. 2.

CHARLES nraxwoon, or (intense, ILLINOIS'.

GAS PLATE.

Specification of Letters Patent.

Patented Feb. '2, 1922.

Application filed April 26, 1920. Serial No. 376,435. I I.

To all whom it may concern: 7

'Be it known that I, CHARLES A. KIRK- wooD, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented new and useful Improvements in Gas Plates, ofwhich the following is a full, clear, and exact descri tion.

l y invention relates to stoves or heaters that use gas for fuel, andparticularly to improvements in stoves or heaters popularly known asgas-plates.

The objects of my invention are to increase the efficiency of such aplate or heater, and to improve the construction thereof so that notonly will it be more durable but it will be cheaper to manufacture andmore economical to operate. This I accomplish by the means hereinafterfully described and as particularly pointed out in the claims.

In the drawings: 7

Figure 1 is a plan view-of a embodying my invention.

Figure 2 is a front elevation thereof.

Figure 3 is a vertical section taken on dotlted line 3, 3, Figure 1,drawn to a larger sea e.

Figure 4 is a horizontal section of one end portion ofsaidplate taken ondotted'line 4, 4, Figure 3.

Figure 5 is a vertical section taken on dotted line 5, 5, Figure 1,drawn'to alarger scale. 7 V

Figure 6 is a horizontal section of a fragment of the plate taken ondotted line 6, 6, Figure 5, showing the *base plate broken away.

Figure 7 is a similar section taken 0 dotted line 7, 7, Figure 5.

Figures 8 and 9 are views showing isolated details the spreader supportand mixing plate, respectively.

Referring to the drawings, A represents an oblong sheet metal top, theends of which are rounded and struck from a center midway between itssides, and together therewith has its edges flanged downwards. This topis provided with two circular openings (6, a, the circumferences ofwhich are struck from the same center as the ends of the top, and theseopenings have the margins thereof flanged downwards, and formed into arabbeted seat B for the outer circular rim of the gas-plates C. and D,respectively.

The top A is supported by four legs E, E, two of which are located ateach end. Le 's E, consist of flat bar-metal, which near their gas-plateupper ends are bent inwardly as at b, andhavc their upper offsetportions c extend up inside the downwardly flanged edge of said top, andhave their upper ends a bent horizontally the top between the rabbetedseat 13, and said flanged edge by nieansof bolts and nuts d. I 1

Neartheir lower ends or feet, these legs are secured together by meansof a baseplate F, the shape of which preferably, con.- forms to that ofthe top and its downwardly turned edges f, are fastened to the innersides of said legs by means of bolts and nuts g. f r

The gas fonthese plates-C and Dis'fura nished by means of'gas-pipes e,e, the outer ends of which lead to and are connected with a supply-pipeH by means of nipples h, which latter are provided with valves, whoseupper ends have handles j'with which in toward and secured to the undersidesof l to regulate them. The outer ends of these gas pipes c, e, aresupported by and pass through openings in theflanged edges fof thebase-plate F and their inner ends terminate in elbows G that pass'upthrough openings in the base-plate whose eenters'ztline 1 7 with thecenters of openings a, of top A and are secured into the lowerendsofvertically disposed tubular mixing chambers I, or

pipes, substantially as shown inthe draws and have a gas-jet J screwedchamber extends upwardly in axial alinement with the axis ofelbow G, andopening a of the top,to a'point below the down wardly flanged edges ofthe latter,-and has the bore of its upper end provided with a V therein.The ends of the legs of the crossshaped mixing-plate are pushed" downintoseries of equi-distant longitudinal grooves T 7 these grooves asshown inFigure 7 and thus. the plate is retained in'the mixing chamber Uas shown in Figure '5 of the drawings. The 7 upper end of this mixingchamber is exte riorlyscrew-threaded, and a screw threa'ded boss N isscrewed down over the same, and this boss has a series of eQui-distantarms p, p, projecting upwards therefrom that are integral with andsupport an inverted concshaped spreader The flames issuing from the minichamber impinge against the underside of this spreader Q, andaredirected radially outward against and thri h the grate-bars or arms0, 0, projecting inwards from the circular rim of the gas-plate l), theinner ends of which arms terminate be fore reaching the center of saidplate substantially as shown in Figure 1 of the draw ings.

The mixing chamber under consists of an upper and lower the uppersection. a is screwed onto section so that it is in alinement axis ofthe lower section and the center of gas-plate C by means of sleeves let.The cross-shaped mixing plate 71: has its ends seated and immovablyclamped between the butt edges of the lower section of the mixingchamber and the upper section thereof.

The plate C (Figure 3) comprises a circular rim and an invertedcone-shaped spreader R- which constitutes the center of the'plate andsaid spreader R is connected to and concentric with said rim andsupported thereby through the medium of a series of equidistant radiallyextending bars or spokes r, r. r

In order to securely hold the mixing chambers in such a position thattheir axes, the axes of the jets, and the center of the mixing plate iswill aline with the centers of the gas-plates, T have provided threebraces L, L, and M, for each mixing chamber. The braces L, L, have theirinner ends provided with openings, through which the upper section ofthe mixing-chambers I project, and they gradually decrease in idth ortaper toward their outer ends as they extend upwards toward the underside of the inwardly projecting upper ends or the legs E, to the underside of which their outer gas-plate C section and the lower with the 7ends are securely fastened by the bolts and nuts (Z, hereinbetorereferred to. The braces M, M,aline with the centers of the gas-platesand are shaped similar to and are interchangeable with braces L, and themixing chambers likewise extend up through openings in one end thereofand their adj acent ends are secured to the under side of the top Abetween said openings by means of screws m, m, or bolts and nuts similarto d and g. The converging ends of these braces are securely clamped tothe upper section a of the mixing chamber 1, (Figure 3) by means of anutG which screws down over R in Figure .3, or may formipart of and besupportedthe boss-N as in Figure 5.

naoatar It does not makeany diilerence whether the gas mixing element inthe mixing-chamber T, consists of a cross similar to that shown inFigure 9 or oi a substitute therefor, whether it consisting of a platesecured in the bore of the mixing-chamber substantially as hereinbeforeexplained or of any other device secured in any other manner therein.All such changes and other details of construction, I desire to beconsidered as comwithin the scope of my invention.

What I claim as new is:

l. A heating device comprising a sheet metal top having its edgesflanged downwards and having an opening therein, a gasplate seated insaid opening, legs the upper ends of which are bent horizontally andsecured to the underside of saidtop-between the flanged edge thereof andsaid opening, a base-plate having its edges flanged downwards andsecured to the inner side 01? said legs, a gas-pipe the outer end ofwhich extendsthrongh the flanged edge of said base plate, an elbow towhich the inner end of said gas-pipe is connected, a mixing chamhavingperforations its base and supported on said base plate, said elbow beingconnected to said mixing chamber, a jet secured in the upturned end ofsaid elbow, and a mixing plate within said mixing chamher, said jet,mixing plate, and gas-plate being in axial alinement with each other.

2. A heating contrivance comprising a sheet metal top having'an openingtherein, a gas-plate seated in said opening having a series ofgrate-bars, a vertically disposed mixing chamber the axis of whichalines with the center of said opening and has a series of apertures inits lower portion, a gas jet in the bore of the mixing chambersurrounded by said apertures, and an inverted concave-convex spreaderabove said mixing chamber that directs the products of combustionoutwards away from the center of said gas-plate, and meansdetachablysupporting said spreader on said mixing cham ber.

3. A heating contrivance comprising a sheet metal top having an openingtherein, a gas-plate seated in said opening having a series ofgratebars, a vertically disposed mixing chamber the axis of which alineswith the center of said opening and has a ieries of apertures in itslower portion, a gas jet in the bore ot the mixing chamber surrounded bysaid apertures, amiXing-platein the bore 01" said mixing-chamber abovesaid jet bracing means for said mixing chamber, and an invertedconcavo-convex spreader above said mixing chamber that directs theproducts of combustion outwards away from the center of said gas-plate,and means for supporting said spreader and retaining said bracing.means. 7

a. A heating contrivance comprising a sheet metal top having an openingtherein, a gas-plate seated in said opening having a series ofgrate-bars, a vertically disposed mixing chamber the axis of whichalines with the center of said opening and has a series of apertures inits lower portion, a gas jet in the bore of the mixing chambersurrounded by said apertures, means for bracing said mixing chamberconnected to the top plate, a boss surrounding and secured to the upperend of said mixing chamber, for retaining said means, arms projectingupwards therefrom and a spreader member which is integral with andsupported by said arms that directs the products of combustion outwardstoward the rim of said gas-plate.

A. heating contrivance comprising a sheet metal top having an openingtherein, a gas-plate seated in said opening having a series ofgrate-bars, a vertically disposed mixing chamber the axis of whichalines with the center of said opening and has a series of apertures inits lower opening, a gas jet in the bore of the mixing chambersurrounded by said apertures, a mixing plate in the bore of said mixingchamber above said jet, a boss surrounding and secured to the upper endof said mixing chamber, arms projecting upwards therefrom and a spreadermember which is integral with and supported by said arms that directsthe products of combustion outwards toward the rim of said gas-plate.

6, A heating device comprising a sheet metal top having an openingtherein, a gasplate seated in said opening, legs for sup porting thedevice, a vertically disposed mixing chamber having a series ofapertures in its lower portion, a gas-jet therein surrounded by saidapertures, and means for maintaining said mixing-chamber in axialalinement with the center of said as-plate including braces throughopenings in the convergent ends of which the upper end of said mixingchamber extends and the outer ends of which extend radially outwards andupwards and are secured to the under side of the top.

7. A heating device comprising a sheet metal top having an openingtherein, a gasplate seated in said opening, legs for supporting thedevice, a vertically disposed mixing chamber having a series ofapertures in its lower portion, a gas-jet therein surround ed by saidapertures, a spreader above the mixing chamber and directing theproducts of combustion therefrom outward towards the rim of thegas-plate, means for supporting ing chamber having a series of aperturesin its lower portion, a gas-jet therein surrounded by said apertures, aboss secured to the upper end of the mixing chamber, arms proj ectingupwards therefrom, a spreading member supported by said arms whichdirects the products of combustion from said chamber outwards toward therim of the gas-plate, and

means for maintaining said mixing-chamber in axial alinement with thecenter of said gas-plate including braces through openings in theconvergent ends of which the upper end of said mixing chamber extendsand the outer ends of which extend radially outwards and upwards and aresecured to the under side of the top.

9. A heating contrivance comprising a sheet metal top having an openingtherein, a gas-plate seated in said opening having a series ofgratebars, a vertically disposed mixing chamber the axis of which alineswith the center of said opening and has a series of apertures in itslower portion, a gas jet in the bore of the mixing chamber surrounded bysaid apertures, and an inverted concavo-convex spreader above saidmixing chamber that directs the products of combus tion outward awayfrom the center of said gas-plate, and means detachably supporting saidspreader on said mixing chamber, said means rigidly connecting the upperend of the mixing chamber to said top-plate, said spreader supportingmeans also serving to retain said connecting means on said mixingchamber.

10. In a heating device, the combination means connected to the topplate for bracing said chamber, and a spreader disposed concentric withand above said chamber and carried by said burner plate. 1

In witness whereof I have hereunto set my hand this 20th day of April,1920.

CHARLES A. KIRKWOOD. Vitnesses:

FRANK D. THOMASON, VIOLET WARDELL.

